Britain26 November, 20253 min read
Office for Budget Responsibility Publishes Budget Forecast 30 Minutes Early, Forces Rachel Reeves to Scramble
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OBR accidentally published Budget documents online before the Chancellor delivered her statement Leak exposed planned tax increases and specific policy measures, including removing the two‑child benefit cap

6 outlets told this the same way.
Early budget document leak
About 30–40 minutes before Chancellor Rachel Reeves began delivering the Autumn Budget, the Office for Budget Responsibility (OBR) accidentally published its normally confidential Economic and Fiscal Outlook on its website. The OBR then removed the document and apologised, calling the early release a 'technical error'. The OBR said it had launched an investigation and would report to its Oversight Board and the Treasury.
“The Office for Budget Responsibility accidentally published its Economic and Fiscal Outlook on its website before Chancellor Rachel Reeves had delivered her Budget statement, then removed the document and said the early release was a ‘technical error.’”
Broadcasters and commentators said the premature posting pre-empted the chancellor's announcement. Reeves described the leak as 'deeply disappointing' and a 'serious error'.

Leaked OBR forecast details
The leaked outlook contained substantive fiscal and growth forecasts that altered the public picture of Reeves’s Budget before she spoke. The OBR’s forecasts showed slower expected growth and productivity than in March and indicated that Reeves’s measures would raise tens of billions by the end of the decade. CNBC gave specific figures — average UK growth of 1.5% over the forecast period, a medium-term productivity forecast of 1.0% and an estimated £26.1bn of tax-raising measures by 2029–30 — while the Eastern Daily Press said the outlook signalled slower UK growth over the next four years and described a package of tax rises and policy changes that tighten the public finances.
Reactions to budget leak
The premature disclosure immediately produced sharp political reactions. Rachel Reeves urged Labour MPs to unite behind the Budget and described the leak as 'deeply disappointing' and a 'serious error.' Opposition figures were harsher, with Shadow Chancellor Sir Mel Stride calling it an 'utterly outrageous' leak of market-sensitive information that could be criminal, according to the Eastern Daily Press.
“Shadow Chancellor Sir Mel Stride called it an ‘utterly outrageous’ leak of market‑sensitive information that could be criminal, and Ms Reeves called it ‘deeply disappointing’ and a ‘serious error.’”
BBC noted that the OBR chair Richard Hughes personally apologised, vowed corrective action, and declined to resign. Broadcasters labelled the early release 'mind-blowing.' CNBC emphasised the formal accountability route of reporting to oversight bodies and committees as part of the response.
Leaked Budget policy changes
Leaked material revealed concrete policy moves that will shape public debate. Messenger Newspapers and the BBC report the Budget appears to end the two-child benefit cap, with Messenger estimating it will cost about £3bn by 2029-30. They also report freezes on personal tax thresholds will be extended for three years to 2030-31, and the BBC notes a proposed pay-per-mile charge for electric vehicles.
CNBC frames the measures within the wider fiscal picture, saying much of the £26.1bn comes largely from freezing personal tax thresholds and smaller measures. The Eastern Daily Press characterised the package broadly as tax rises and policy changes tightening the public finances.

OBR report and political fallout
All outlets report the OBR investigation and formal reporting that could yield accountability and procedural changes. CNBC and the Eastern Daily Press note the OBR will report findings to oversight bodies, and the BBC records that the chair apologised and declined to step down. Politically, the episode has immediate costs for Reeves; she used her Budget speech to urge unity and try to manage the narrative.
“The OBR apologised, removed the document, said it had launched an investigation, and will report the findings to its Oversight Board, the Treasury and the Commons Treasury Committee; it plans to re-release the outlook when the chancellor finishes her speech.”
It also risks prolonging scrutiny as committees and media probe how a normally confidential forecast was published early. Commentators warned the early release pre-empted the chancellor's announcements, and the OBR plans to re-release the outlook when the chancellor finishes her speech.
